Physics Letters B
Volume 658, Issue 4, 3 January 2008, Pages 101-108
C. Arpesella et al. (Borexino Collaboration) M. Wójcik, G. Zuzel, M. Misiaszek
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Abstract
This Letter reports a direct measurement of the 7Be solar neutrino signal rate performed with the Borexino low background liquid scintillator detector at the Laboratori Nazionali del Gran Sasso. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV 7Be neutrinos is 47±7stat±12sys counts/(day * 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters.